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how different lights affect plant growth?

Posted: Fri Nov 07, 2003 6:27 pm
by H-chris45
yo,

well ive finally decided to move the plant to my friends place, since i am still wwaaaayyy too paranoid abt gettin caught. bt the thing is that he doesnt know how to grow either.

the plants like 2 wks old, about 5.5 inches high (15cm?) there are 2 small leaves, and further up (like an inch) a larger new set of leaves at the top (with what looks like 2 other leaves coming through).

Hes tried 2 different lights, i wont go into details about what exactly they are (he hasnt got any alternatives anyway), so ill tell you about the different effects that they had on its growth.

the first light results in the leaves spreading out, i.e. they grow so that they are perpendicular to the stem. however we find that the stem growth (vertical growth) is slower when compared to the second light.

with the second light, we find that the leaves tend to close up more, i.e. they become more vertical, however, the stem growth is notibly faster.
btw, the second light emits more heat.

so my question is, which type of growth is more desireable for the plant at this stage in growth?

thanks

Posted: Sat Nov 08, 2003 7:10 pm
by Weedguru Higher
Okay..I'm not exactly sure that I understand about your lights..

You dont need the heat fom the light..its not he heat that makes it grow, its the shade/color of the light thats emitted more. Umm its hard to say what better..dont know what ya got and dont really understand!

If your plant is like growing tall, skinny and fast in height, with the leaves more spread apart, then that is a sign the light is not strong enough at all. It will grow long and tall like that becasue the plant is using all its energy to try and reach itself closer to the light source that it needs to survive.

If the leaves are like curling up and drying then thats casue the plant is too hot, dont keep the light too close to it

Dont forget that each kind of weed plant grows differently too. Some grow taller faster, some are shorter and fat. Cant change that its genetics.

Dont change the light types on the same plant. If you start with one kind, finish it that way. ANd keep it on a regular light cycle too. At this stage 24 hr light is best..the plant grows faster that way

did I even answer your question?. I think Im rambling...

Posted: Sun Nov 09, 2003 1:10 pm
by H-chris45
hi, i think it would be more helpful if i told you the specs of the light bulbs, the first is a clear glass bulb, where you can see the fillament inside, and it says 'BML 240V, 60W' on the outside.

to the best of my knowledge this bulb is an INCANDESENT LIGHT BULB.
(im not sure, cos im alittle confused abt this shit)

when he used this type of light bulb, there was alot of vertical growth, however, the leaves seemed to close up, not curl up as if they were dying. they sort of went from forming a ___ ___ across at the top of the stem to forming a 'V' shape.


OK now the second bulb that he used is not even a bulb i dont think, its alot like this one (along with alot of info): http://www.overgrow.com/growfaq/1477

to the best of my knowledge this bulb is a COMPACT FLOURO, and looks like this:

Image

well the effect that this has on the growth is that the leaves tent to broaden out, but the vertical stem growth seems to be slower. so its kinda like opposite the first one. so it goes grom a more 'V' shaped leaves at the top to a flatter shape, and vertical stem growth is seemingly slower.


phew, hope thats understandable!
so what type of growth pattern is best, and so what type of light is the best?

thanks alot

Posted: Mon Nov 10, 2003 12:09 am
by Weedguru Higher
Well personally i wouldn't pick either...lol

No, but to me, if you wanna pick between those to, I'd go with the fluro one. i use fluros for the first stage of growing, then switch it to HPS. But you could just keep the fluros through the entire cycle. They are much better than incadescent bulbs. Those coke can reflectors are areal good idea in that link...make some. You can use several of those lights at once..the more light the better. Just watch out for overheating.